Held in place by tiny super magnets the lenses in our second prototype could be easily removed and replaced with sunglass lenses.

Magnets also made the new pair far safer as snags would pull away an individual lens harmlessly.

Hinges were also added so that the lenses could be set at the optimal angle to the eye.

Assembly - First, the magnets (D) were placed inside brackets (C). Then C1 and C2 were screwed together using a generic screw (B) to form the left bracket. The right bracket was assembled similarly.
The brackets were then attached to the barbell using screws matching the barbell thread size (A.) Finally, C5 and C6, were attached to the lenses with more generic screws (B.)